My new mouse won't work with my iMac running macOS 10.15
I needed a new mouse, but when it came and I charged it with the new cord provided, I can not program it in preferences. The pointer works but I can't scroll or right click. I'm still using Catalina, are the two not compatible?
[Re-Titled by Moderator]
Original Title: New mouse for old IMac 10.15
iMac 21.5″, macOS 10.15